<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登陆表单区 -->
            <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
                </el-form-item>
                <!-- 按钮区 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登陆</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>

export default {
    data(){
        return {
            //这是登录表单的数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            loginFormRules: {
                // 验证用户名是否合法
                username:[
                    {required:true,message:"Please enter login name！",trigger:"blur"},
                    {min:3,max:10,message:"Length is 3 to 10 characters！",trigger:"blur"}
                ],
                // 验证密码是否合法
                password:[
                    {required:true,message:"Please input a password！",trigger:"blur"},
                    {min:6,max:16,message:"Length is 6 to 16 characters！",trigger:"blur"}
                ]
            }
        }
    },
    methods:{
        //点击重置按钮  重置登录表单
        resetLoginForm(){
            this.$refs.loginFormRef.resetFields();
        },
        //登陆之前  对表单进行预验证
        login(){
            this.$refs.loginFormRef.validate( async valid=>{
                if(!valid) return;
                const {data:res} =  await this.$http.post('login',this.loginForm);
                if(res.meta.status !==200 )
                    return this.$message.error('Login failed')

                this.$message.success('Login successful')
                window.sessionStorage.setItem("token",res.data.token);
                this.$router.push('/home');
            });
        }
    }
}

</script>

<style lang="less" scoped>
    .login_container{
        background-color: #0489B1;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        .avatar_box{
            position: absolute;
            left: 50%;
            transform: translate(-50%,-50%);
            padding: 10px;
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            box-shadow: 0 0 10px #ddd;
            background-color: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
    .login_form{
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .btns{
        display: flex;
        justify-content: flex-end;
    }
</style>